N.Y. Lien Law § 39-C
If for any reason after the work of a private or a public improvement of real property is abandoned by an owner, a contractor or a subcontractor before the completion thereof by such owner, contractor or subcontractor, or if, after the same is completed, materials delivered are not used therefor, a person who has delivered materials for the improvement which have not been incorporated therein and for which he has not received payment may repossess and remove such materials; and thereupon he shall have no lien on the real property or improvements against persons secondarily liable, for the price thereof, but he shall have the same rights in regard to the materials as if he had never parted with the possession. This right to repossess and remove the materials shall not be affected by their sale, encumbrance, attachment, or transfer from the site of the improvement, except that, if the materials have been so transferred, the right to repossess them shall not be effective as against a purchaser or encumbrancer thereof in good faith whose interest therein shall have arisen since such transfer from the site of the improvement, or as against a creditor attaching after such transfer. The right to repossession and removal given by this section shall extend only to materials whose purchase price does not exceed the amount remaining due to the person repossessing; but where materials have been partly paid for, the person delivering them may repossess them as allowed in this section on refunding the part of the purchase price which has been paid less the cost of removal.
N.Y. Lien Law § 39-C